Re^2: Entry widget with explicit submit button

[amiksingh]

Yes, I am using TK. I read Validation in Entry, but that gives you option of "focus" on entry box and "key". But what I need is a separate button for a user to validate it.

(For example, a user may play around with the text in Entry box, but he may not choose to conform to changes and might close the window. So, I want a submit button alongwith it. Only when it is pressed, I'll take the input.)

[choroba]

Such a functionality does not exist. You have to create a normal Tk::Button and implement the logic yourself in its -command.

[amiksingh]

okay, but I can't think of a logic because -textvariable of entry widget is changed on the go (as and when user types/changes something). So, how do I revert back to original data on a call from -command of button? (I guess that should have been my exact question, Sorry!)

[7stud]

Why are you using a textvariable at all?

use strict;
use warnings;
use 5.012;

use Tk;

my $entry_text;


my $mw = MainWindow->new;

my $entry = $mw->Entry(
    -text => 'Enter answer here',
)->pack;

$entry->focus;
$entry->selectionRange(0, 'end');

sub my_validator {
    my $input = $entry->get();

    if ($input eq 'hello') {
        $entry->delete(0, 'end');
        $entry->insert(0, 'Try again!');
        $entry->selectionRange(0, 'end');
        $entry->icursor(0);
    }
    else {
        say "Thanks for the great input!";
        $entry_text = $input;
        say $entry_text;
    }
}

$mw->Button(
    -text       => 'Submit',
    -command    => \&my_validator,
)->pack;

MainLoop;

[Anonymous Monk]

it simple, you keep track of the changes